net, ipv6: convert ipv6_txoptions.refcnt from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Tue, 4 Jul 2017 06:34:54 +0000 (09:34 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 4 Jul 2017 08:29:03 +0000 (01:29 -0700)
commit0aeea21ada517b99a6e95298ffc105381bcd3a52
tree5a09b35a770e6893d3f146053463a64ddce6488b
parent25f4535a94c2b38d09912d7e8bab371c9e97be38
net, ipv6: convert ipv6_txoptions.refcnt from atomic_t to refcount_t

refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/ipv6.h
net/ipv6/exthdrs.c
net/ipv6/ipv6_sockglue.c